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Quellcode

//kotzing.h
#ifndef KOTZING_HEADER
#define KOTZING_HEADER
#include <allegro.h>

BITMAP*      doubleBuffer = NULL;
extern volatile int timerCounter;

void fatalError(char *str);
void show();

#endif

Quellcode

//kotzing.cpp
#include <allegro.h>
#include <time.h>
#include "kotzing.h"
#include "title.h"

volatile int timerCounter = 0;
static void  timerCounterUpdater() 
{
    timerCounter++;    
}
END_OF_STATIC_FUNCTION(timerCounterUpdater);

//Funktionen
void fatalError(char *str) 
{
    allegro_message(str);
    exit(0);
}

int setGfxMode(int mode, int width, int height) 
{
    static int colorDepths[] = { 16, 24, 15, 32};
    int a;  
    
    for (a=0; a < 4; a++) 
    {
        set_color_depth(colorDepths[a]);
        if (set_gfx_mode(mode, width, height, 0, 0) >= 0) 
        {
            return TRUE;
        }
    }
    return FALSE;
}

void show() 
{
    blit(doubleBuffer, screen, 0,0,0,0, doubleBuffer->w, doubleBuffer->h);
}

void init() 
{
    srand(time(NULL));
    
    //init
    allegro_init();

    if (!setGfxMode(GFX_AUTODETECT_FULLSCREEN, 1024, 768)) 
    {
        if (!setGfxMode(GFX_AUTODETECT_WINDOWED, 1024, 768)) 
        {
            fatalError("Unable to set a graphics mode");
        }
    }
    install_timer();    
    install_keyboard();
    install_joystick(JOY_TYPE_AUTODETECT);
    install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL);
    
    doubleBuffer = create_bitmap(SCREEN_W, SCREEN_H);
    if (!doubleBuffer) 
    {
        fatalError("Unable to create double buffer");
    }

    LOCK_FUNCTION(timerCounterUpdater);
    LOCK_VARIABLE(timerCounter);
    install_int_ex(timerCounterUpdater, BPS_TO_TIMER(60));
}

//ende
void done() 
{
    destroy_bitmap(doubleBuffer);
}

//main
int main(int argc, char** argv) 
{
    int gameOver = FALSE;
    
    init();
    
    while (!gameOver) 
    {
       title();
    }
    
    done();
} 
END_OF_MAIN();

Quellcode

//title.h
#ifndef TITLE_HEADER
#define TITLE_HEADER

int title();

#endif

Quellcode

//Title.cpp
#include "kotzing.h"
#include "title.h"

int title()
{
    BITMAP *title = load_bitmap("data/title.bmp", NULL);
    if(!title)
    {
        fatalError("Bild konnte nicht geladen werden: title.bmp");
    }
    
    blit(title, doubleBuffer, 0, 0, 0, 0, SCREEN_W, SCREEN_H);
    destroy_bitmap(title);
    
    //Tastatur abfragen
    clear_keybuf();
    while(!keypressed())
    {
        show();
    }
    
    int keyValue = readkey();
    if ((keyValue >> 8) == KEY_ESC)
    {
        return FALSE;
    }
    clear_keybuf();
    
    return TRUE;
}